package com.it.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import com.it.reggie.dto.DishDto;
import com.it.reggie.entity.Dish;
import com.it.reggie.entity.DishFlavor;
import com.it.reggie.mapper.DishMapper;
import com.it.reggie.service.DishFlavorService;
import com.it.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;


    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品基本信息到菜品表dish
        //给dishDto的id赋值;拼接sql;保存数据库
        this.save(dishDto);
        //获取dishDto的id
        Long dishid = dishDto.getId();
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        /*//方式1:遍历循环
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishid);
        }*/

        //方式2:Stream流
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishid);
            return item;
        }).collect(Collectors.toList());
        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据分类id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {

        //查询菜品基本信息,从dish表查询
        Dish dish = this.getById(id);
        //创建对象,封装数据
        DishDto dishDto = new DishDto();
        //菜品信息拷贝
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应得到口味信息,从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /**
     * 更新菜品信息,同时更新对应的口味信息
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors.stream().map((item) -> {
           item.setDishId(dishDto.getId());
           return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }
}
